package org.linlinjava.litemall.wx.util;

import com.thoughtworks.xstream.XStream;
import com.thoughtworks.xstream.core.util.QuickWriter;
import com.thoughtworks.xstream.io.HierarchicalStreamWriter;
import com.thoughtworks.xstream.io.xml.DomDriver;
import com.thoughtworks.xstream.io.xml.PrettyPrintWriter;
import com.thoughtworks.xstream.io.xml.XppDriver;
import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;
import org.linlinjava.litemall.wx.vo.Coupon;
import org.linlinjava.litemall.wx.vo.wechart.EnterprisePayment;

import javax.servlet.http.HttpServletRequest;
import java.io.InputStream;
import java.io.Writer;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.TreeMap;

/**
 * @Author:cat
 * @Description 微信消息工具类
 * @Date: 2018-04-12  10:00
 * @Modified By:
 */
public class MessageUtil {
	
	
    public static final String REQ_MESSAGE_TYPE_IMAGE = "image";//请求消息类型：图片

    public static final String REQ_MESSAGE_TYPE_LINK = "link";//请求消息类型：链接

    public static final String REQ_MESSAGE_TYPE_LOCATION = "location";//请求消息类型：地理位置

    public static final String REQ_MESSAGE_TYPE_VOICE = "voice";//请求消息类型：音频

    public static final String REQ_MESSAGE_TYPE_EVENT = "event";//请求消息类型：推送
    
    public static final String REQ_MESSAGE_TYPE_TEXT = "text";//请求消息类型：文本
    

    public static final String RESP_MESSAGE_TYPE_TEXT = "text";//返回消息类型：回复文本消息

    public static final String RESP_MESSAGE_TYPE_IMAGE = "image";//返回消息类型：回复图片消息

    public static final String RESP_MESSAGE_TYPE_VOICE = "voice";//返回消息类型：回复语音消息
    
    public static final String RESP_MESSAGE_TYPE_VIDEO = "video";//返回消息类型：回复视频消息
    
    public static final String RESP_MESSAGE_TYPE_MUSIC = "music";//返回消息类型：回复音乐消息
    
    public static final String RESP_MESSAGE_TYPE_NEWS = "news";//返回消息类型：回复图文消息

   
    public static final String EVENT_TYPE_SUBSCRIBE = "subscribe";//事件类型：subscribe(订阅)and 未关注群体扫描二维码

    public static final String EVENT_TYPE_SCAN="SCAN";//事件类型：已关注群体扫描二维码
 
    public static final String EVENT_TYPE_UNSUBSCRIBE = "unsubscribe";//事件类型：unsubscribe(取消订阅)
    
    public static final String EVENT_TYPE_LOCATION="LOCATION";//事件类型：

    public static final String EVENT_TYPE_CLICK = "CLICK";//事件类型：CLICK(自定义菜单点击事件)
   
    public static final String EVENT_TYPE_VIEW = "VIEW";//事件类型：VIEW(点击自定义菜单跳转链接时的事件)

    public static final String EVENT_TYPE_TRANSFER_CUSTOMER_SERVICE = "transfer_customer_service";//事件类型：transfer_customer_service(把消息推送给客服)


    /**
     * 解析微信发来的请求（XML）
     *
     * @param request
     * @return
     * @throws Exception
     */
    @SuppressWarnings("unchecked")
    //屏蔽某些编译时的警告信息(在强制类型转换的时候编译器会给出警告)
    public static Map<String, String> parseXml(HttpServletRequest request) throws Exception {
        // 将解析结果存储在HashMap中
        Map<String, String> map = new HashMap<String, String>();

        // 从request中取得输入流
        InputStream inputStream = request.getInputStream();
        // 读取输入流
        SAXReader reader = new SAXReader();
        Document document = reader.read(inputStream);
        // 得到xml根元素
        Element root = document.getRootElement();
        // 得到根元素的所有子节点
        List<Element> elementList = root.elements();

        // 遍历所有子节点
        for (Element e : elementList)
            map.put(e.getName(), e.getText());

        // 释放资源
        inputStream.close();
        inputStream = null;

        return map;
    }
    public static String messageToXml( EnterprisePayment enterprisePayment) {
        xstream.alias("xml", enterprisePayment.getClass()); 
        return xstream.toXML(enterprisePayment); 
    }
  public static String messageToXml( Coupon p) {
    xstream.alias("xml", p.getClass());
    return xstream.toXML(p);
  }
  /**
   * 扩展xstream，使其支持CDATA块
   *
   * @date
   */
  private static XStream xstream = new XStream(new XppDriver() {
    public HierarchicalStreamWriter createWriter(Writer out) {
      return new PrettyPrintWriter(out) {
        // 对所有xml节点的转换都增加CDATA标记
        boolean cdata = true;

        @SuppressWarnings("unchecked")
        public void startNode(String name, Class clazz) {
          super.startNode(name, clazz);
        }

        protected void writeText(QuickWriter writer, String text) {
          if (cdata) {
            writer.write("<![CDATA[");
            writer.write(text);
            writer.write("]]>");
          } else {
            writer.write(text);
          }
        }
      };
    }
  });


}
